A slut FUCK is quietly seduced by her younger brother's girlfriend in a place where she can't speak

Recently, my younger brother started dating a woman called AIKA, a gal, and she started visiting her house frequently. One day, AIKA was having fun talking to her younger brother, but I was struggling to see her beautiful figure and panty shots from her revealing costume. At that moment, AIKA smiled charmingly and invited me, "Why don't you play with something interesting?" He must never be lustful, and he seduces me and plays with me in a situation where he can't do anything lewd...